Carbureter.



L. PLEIN.

GARBURETER. APPLICATION FILED 11:13.24, 1911.

Patented Feb. 27; 1912 can-"sesame.

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Specification of? Letters Patent.

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ltatented Feb. 2'? 1912.

Application filed February 24, 1911. Serial 610,509.

T all whom it may concern:

Be it known that I, Louis PLEIN, a subject of the Grand Duke of Luxeinburg, re siding at Chicago, county of Cook, and State of illinois, have invented certain new and useful Improvements in Carburetors, of which the following is a specification.

. Myinvention relates to improvements in carbureters and has for its object the pro vision ofan improved carbureting device for internal combustion engines which shall.

be so constructed as tobe capable of supplying a correct homogeneous explosive mixture of air and gas to the engine cylinders at any speed of the engine and under all and varying conditions of atmosphere.

A; further object of my invention is to provide a carburetor which shall be symmetrical in design, economical to xnanufao ture, and eiilcient in operation,

@ther objects will appear hereinafter.

With these objects in view my invention consists in the novel construction and an rangement of parts all as will be hereinafter fully described and more particularly pointed out in the appended claims.

-My invention will be more readilyunderstood by reference to the accompanying drawings forming a part of this specification, and which,

Figure 1 is a central vertical section of a carburetor embodying myinvention, and Fig. 2 is a side elevation thereof.

Referring now to the drawings 1 indicates a fioat'chamber and 2 a float therein. The float is of annular form and is hingedly mounted on a horizontal pin 3 so as to move upwardly and downwardly according tothe level of the gasolene or other liquid hydrocarbon 2' in the chamber 1. 4iindicates the fuel intake valve which is provided with a stem'5 projecting into'the chamber 1 and abuttingthe side of the float beneath the hinge pin 3; A spring 4; tends to keep the valve normally seated, but when the fuel in the'tloat chamber falls below a predeterined level, the'tloat by'engaging the stem 5 forces 'thevalve "from its seat and admits fuel to the chamber 1 until the fuel reaches its proper level. By this construction the proper-level of fuel isaccurately maintained in the chamber 1. The upperend of the chamber 1 is open and provided with a closure 13 which will be fully described here- .inafter. lindica tee the bottom of the float chamber and below said bottom is a heating chamber 15, the walls of which are provided with threaded apertures 15 to receive pipes for supplying the heating medium which may be either hot water, hot air or the products of combustion of the engine.

The closure 13 comprises a plate 18 se cured in position by screws 18, and a superimposed mixing chamber 13 defined by a bottom wall 13 and annular walls 13. The bottom. wall 13" lies parallel with the plate 18 and a short distance above the same, the intervening space constituting a recess the function of which will appear hereinafter. The mixing chamber is open at the top except for an annular flange l3 extending inwardly from the upper edge of the walls 13, and is provided with a cover plate 20, hav ing an educt-ion passage way leading to the engine supply pipe and a coupling 24 for securing the device to said supply pipe. 11 indicates the throttle valve for said passage way mounted upon a stem or shaft 21 upon the end of which is secured a throttle lever 22. The throw of said lever, and consequently the valve, is limited by a pair of screws 23 threaded through lugs 23 on the lever and adaptedto engage the cover plate 20. i

' Extending centrally through. the heating chamber 15 and the float chamber 1 is a vertical primary air passage way 10. leading into the bottom of the mixing chamber 13 Formed centrally within the lower portion oi. the passage 10 is a member 7' which is preferably cast integrally with the-shell of the float chamber and connected thereto by arms 7". The member 7 is provided with a chamber 7 which may be formed therein by drillingand the lower end of said chamher is closed by the nipple'of-adrain cock capped into the same.

6 indicates inclined passage ways for the hydrocarbon leading from the bottom of the float chamber through the arms 7' to the chamber 7.; A spray nozzleS- extends from the chamber 7 through the upper end of the member 7 intothe passage way- 10 and terminates ata point slightly above the level. of the fuel in the float chamber. The nozzle 8 is removable and may be interchanged with those of diiterent sizeslto adapt the carbu rotor for use with engines of different styles in diameter at the upper end of the nozzle for obvious reasons.

and sizes. The passage way. 10 is contracted 1 The air passage way 10 and the nozzle 8 are sufiicient to supply the necessary fuel to the engine under normal conditions or unless the engine is running at high speed,- in' which case a mixture must provide the device with means for supplying eater amount of explosive arr-additional amount of air to the mixing chamber according to the demands of the engine and further provide means for supplymg the additional air with vaporized hydrocarbon before it enters said chamber.

. have guide bearings 19 formed in the flange 13; .The difference in weight of the several valves is obtained by boring the valves to different depths. In operation, as soon as the demand of the motor orengine increases beyond the maximum supply of the passage ,way 10, the valves 12 open, the lightest valve opening first and the others in regular succession according to the increased demand of covered by a rin theengine for gas.

Extending through the top plate 18 ofthe chamber 1 is a series of perforations 17 through which vapor is supplied to the additional'air admitted through the apertures 12; The perforations 17 are arranged in an annular series and 'their innerends are of felt or other similar absorbent materia 13. The, ring 13 is held in position by a hollow annular member 13', U-shaped in cross section and secured to the underface of the closure plate 18, preferably extending into an annular groove 18" formed therein. The member 13 is provided with a plurality of openings 1%1. Vapor rising from the fuel in the float chamber passes through the perforations 14 and permeates the absorbent ring from which it is given off through the perforations 17 tothe air when drawn in through the openings 12'.

Under some conditions suflicient vapor may not be given off to properly impregnate the ring and it is to meet these conditions that the heating chamber, 15 is provided. When the carbureter is used upon an automobile. the continual motion will cause splashing of the fuel in the chamber in which case the felt ring will be saturated with the liquid hydrocarbon, and under theseconditions'the heating chamber need seldom be used.

Due to the carburetion 'of the supplemensupplied. To this end varyin tary air as well as the primary-or initialair superior results are obtained with this carbureter,'and it may be stated that when any of the lighter hydrocarbons areused the sameare mixed with air in the right portions at any engine speed an conditions of atmosphere.

Having described my. invention what; I claim as new and desire to secure by Letters Patent is:

1. In a carbureter, an air and gas passageway and an annular float chamber surrounding the same, means for supplying a liquidhydrocarbon to said float chamber, means for conducting said hydrocarbon in the form of spray to said passage-way thus carbureting air passing therethrough, a" series of supplementary valves surrounding said passage-way, and means for carbureting the air drawn through said supplementary valves,

substantially as described.

2. In, a carbureter, a main air and} gas passage, a nozzle therein, a seriesofsupplemental air and gas valvesfsurrounding said main passage, said valves being gravity operated, and means for. supplying gas to the air prior to the passage thereof through saidrmain passage and said valves, substali tially as described.

3. In a carbureter, an annular float chamber, a nozzle therein, a hinged float pivoted to swing vertically in said chamber, a spring-pressed gasolene intake valve. adapted to be opened by the falling of said float, I

an initial air and gas 'passage'inclosed by said float chamber and in communication therewith, a series of gravity operated supplemental valves arranged in a circle concentric with said initial air and gas passage a'ndin communication therewith, and means for.supplying carbureted air to said valves,

substantially as described.

4. In a carbureter, an annular float chamber, a float pivoted in said chamber and adapted to regulate the admission of a liquid hydrocarbon thereto, a' cover for said float chamber, an annular holder U-shaped in cross section and secured on said cover, an absorbent filling in said holder, an annular recess in said cover, there being perforations in said holder and said cover so located that said filling is in communication with said float chamber and said recess, a series of gravity operated supplemental valves arranged in a circle concentric with said float chamber and in communication with said recess, said valves varying in weight whereby the same operate. successively, and a central air and gas passage in open communication with said'supplemental valves, the. former being adapted to supply primary carbureted air and the latter secondary carbureted air for high engine speeds, substantially as described.

5.. In a carbureter, an annular float chamher, a float pivoted in said float chamber and adapted to'control the admission of a liquid hydrocarbon thereto, a cover for said float chamber, an annular holder U-shaped in cross section provided in said cover, a felt filling in said holder, an annular recess in said cover,'there being perforations in said holder and said cover in communication 15 said passage ways, said valves being cylinwith said float chamber and in communication with said recess, a plurality of gravity operated supplemental valves controlling drica l and: provided with axial bores of varying length, and a central air and gas passage in open communication w1th said supplemental valves, the central passage be- .ing adapted to supply primary carbureted air and the supplemental passage wayssecondary carbu-reted air, substantially as described.

In testimony whereof I have signed my nameto this specification in the presence of two subscribing witnesses.

- LOUIS PLEIN. Witnesses: W. OJ SMITH,

JosHUA'R. H. Porn. 

